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Originally Posted by cosmocrazy
This is my first question on this site , and from what i have read most members who post on this site are a lot more knowledgeable than me so i,m looking forward to learning lots!. Hello to everyone and thanks for viewing my thread! 
Does gravitational effect happen instantaneously or is it constrained to the speed of light? for example if the sun was suddenly to disappear would there be a delay in the gravitational effect (or lack of) felt by the earth instantaneously or would there be the 8 minutes or so delay (the time it takes for the light to travel to the earth from the sun) ? If so either way, would these effects apply to the other 3 fundamental forces known to physics? electromagnetism, strong and weak nuclear forces?? also is there a experiment possible to prove the effects either way? 
The universe has to be the way it is, so we are able to ask why the universe is the way it is. |
I'm no cosmologist or physicist, my experience with gravity is mostly confined to falling over, but I understand gravity is thought to propagate at the speed of light so if the sun were to disappear we wouldn't notice it for about the 8 minutes it takes, as I understand it the other forces are also SOL limited, as for experiments well we've measured the speed of light several times, not sure about the rest though, I'll leave that to wiser heads than mine.